CN1173730A

CN1173730A - Panel washing device for cathod ray tube

Info

Publication number: CN1173730A
Application number: CN96123987A
Authority: CN
Inventors: 李吉元
Original assignee: Samsung Electron Devices Co Ltd
Current assignee: Samsung SDI Co Ltd
Priority date: 1996-07-30
Filing date: 1996-12-31
Publication date: 1998-02-18
Also published as: KR100189838B1; DE19651256A1; JPH1069855A; KR980011597A; US5778912A

Abstract

The invention provides a screen cleaning device of a cathode ray tube. The screen cleaning device comprises a pylon for conveying the screen, a groove arranged below the screen, a reticular plate arranged in the groove, an elastic component arranged between the bottom surface of the groove and the reticular plate for upward moving the reticular plate elastically, and a riser for rising the groove. Thereby, the invention can effectively clean the internal and the external surface and the sealing end of a screen rim.

Description

The screen dish cleaning device of cathode ray tube

The present invention relates to the screen dish cleaning device of cathode ray tube (CRT), particularly clean the cathode-ray tube blanking disk cleaning device of the impurity that is adsorbed in screen dish shirt rim.

Usually, cathode ray tube comprises the screen dish 10 that has fluorescent film on it, with the shadow mask-frame assembly 12 of preset distance from 10 assemblings of screen dish, and sealing and the cone 14 that links to each other with screen dish 10, be contained in the electron gun 16 in the cone 14a, around the deflection system 18 of the conus portion 14b of cone 14 installation.

In the manufacturing process of screen dish, have to remove to be attached to by the technology of the impurity of the screen dish shirt rim surfaces externally and internally of sealing-in and end, this technology was carried out form fluorescence and reflectance coating and screen dish and cone sealing-in in the screen dish before.Owing in the technology that forms screen dish fluorescent film, apply the paint vehicle on shirt rim inner surface and sealed end, when forming reflectance coating or the sealing-in of screen awl, be counted as impurity, therefore it thoroughly should be washed.

Fig. 2 illustrates the example of the conventional cleaning device that cleans screen dish shirt rim.

Screen dish cleaning device comprises hanger 21, and each side of its support screen dish 10 faces down screen dish shirt rim 10a, and transmits and rotary screen dish 10 with this state; Be contained in the strutting piece 22 under the hanger 21; Be immersed in the fabric 23 in the strutting piece 22 lip-deep acetone; The cylinder 25 of the support 24 of supported part 22 and lifting strutting piece 22.

Have in the routine screen dish cleaning device of said structure, when hanger 21 transferred to the top of strutting piece 22 with screen dish 10, cylinder 25 promoted strutting piece 22, makes the sealed end of shirt rim 10a and contacting of the fabric 23 that is attached to strutting piece 22.At this moment, hanger 21 rotation drives 10 rotations of screen dishes, and causing friction between the sealed end of fabric 23 and shirt rim 10a contacts, so the screen dish is cleaned.

, there is following point in band rule screen dish cleaning device.At first, owing to fabric contacts with the shirt rim sealed end, thereby can not clean the surfaces externally and internally of shirt rim.Therefore, in forming the technology of reflectance coating, be substandard products because of the screen dish that exists impurity to make to make.Secondly, the sloping portion that is formed at the shirt rim sealed end can not thoroughly be cleaned, so because of existing impurity to cause bad sealing-in on the sloping portion.Moreover the cleaning fluid that immerses in the fabric is splashed in the screen dish, can pollute the fluorescent film that is formed in the screen dish.

The object of the invention provides a kind of screen dish cleaning device that can clean screen dish shirt rim surfaces externally and internally and sealed end effectively.

For achieving the above object, provide the screen dish that comprises following part cleaning device, promptly transmit the hanger of screen dish; Be positioned under the screen dish that transmits by hanger, hold the groove of screen dish shirt rim and interior dress screen dish shirt rim cleaning fluid; Be contained in the reticular lamina in the groove; Be contained between bottom land surface and the reticular lamina, upwards the elastic component of elasticity mobile network shape plate; With the device of upgrading slot to the screen dish.

Introduce the embodiment of the invention with reference to the accompanying drawings in detail, will make above-mentioned purpose of the present invention and advantage clearer, in the accompanying drawing:

Fig. 1 is the profile of conventional cathode ray tube;

Fig. 2 is the end view of conventional screen dish cleaning device;

Fig. 3 is the end view of screen dish cleaning device of the present invention;

Fig. 4 is the plane graph of groove shown in Figure 3.

Referring to Fig. 3 and Fig. 4, the screen dish cleaning device of most preferred embodiment of the present invention comprises: the hanger 31 that has head 31a, with the groove 32 that is contained under the screen dish 10 that is being supported by head 31a, head 31a is used for support screen dish 10 each side, and the sealed end that screen coils 10 shirt rim 10a is faced down.The pars intermedia office of groove 32 is formed the groove 32a of leakage air and cleaning fluid by the inwall 32c of groove 32.Herein, the outer wall 32b of groove 32 does to such an extent that be higher than inwall 32c.

In the groove 32, reticular lamina 33 is housed, makes on it with being contained in spring on groove 32 bottoms and move.The stop block 32d that the reticular lamina 33 that is supported by spring 34 is contained in the groove 32 outer wall 32b limits, and is positioned at preset distance place on the cleaning solution, thereby keeps reticular lamina on the cleaning fluid surface.Here make cleaning fluid with acetone.Provide the supply pipe 35 of acetone to be connected on the outer wall 32b of groove 32.The downcomer 36 of discharging cleaning fluid is contained in groove 32 bottoms.Valve 35a, the 36a of control cleaning fluid flow velocity are contained in respectively on supply pipe 35 and the downcomer 36.

Groove 32 is promoted to the lifter 40 of the screen dish 10 that is supported by hanger 31, is contained in groove 32 times.Lifter 40 comprises the support 41 that is fixed in groove 32 lower surfaces, a side of these support 41 extend through grooves; One end is connected to the guide rod 43 of support 41, and guide rod 43 is with framework 42 slidably; Cylinder 44 with the bar 44a that is connected to guide rod 43 other ends.Reference number 50 expressions receive the funnel of the cleaning fluid that overflows by groove 32a.

Screen dish cleaning device of the present invention with said structure operates by following mode.

As shown in Figure 3, when the screen dish 10 that is supported by the head 31a of hanger 31 placed on the groove 32, the cylinder 44 of lifter 40 promoted guide rods 43, so groove 32 rises to predetermined altitude.Therefore, the sealed end of shirt rim 10a contacts with the upper surface of reticular lamina 33, and the elastic force of resistance spring 34, presses down reticular lamina 33, thereby the shirt rim 10a of screen dish 10 is immersed in the cleaning fluid.

Therefore, the impurity that is attached to the lacquer and so on of shirt rim 10a surfaces externally and internally and sealed end is dissolved in the acetone and is eliminated.Clean screen and coiled 10 o'clock, preferably upgrading slot 32 to be easy to dissolved impurity, for example dissolves lacquer in acetone.When needing, rotatable hanger 31 comes rotary screen dish 10.In the cleaning process, preferably utilize supply pipe 35 to supply with a certain amount of cleaning fluid, keep the adaptation concentration of acetone.At this moment, the cleaning fluid that overflows from groove 32 leaks into funnel 50 by the concave part 32a that is fixed in the centre position.

Thoroughly clean as mentioned above after the surfaces externally and internally and sealed end of shirt rim 10a, running cylinder 44 descends groove 32, and expose from cleaning fluid the end of screen dish 10.At this moment, along with groove 32 reduces, because spring 34 resilient movement, web plate 33 rises, and is stopped by stop block 32d.

The screen dish cleaning device of the present invention of working in a manner described has following effect.

At first, the surfaces externally and internally and the sealed end of screen dish capable of washing shirt rim.Secondly, the impurity that is attached to the sealed end sloping portion capable of washing.The 3rd, because the reticular lamina that contacts with sealed end is contained in the groove, can flexibly moves up, thereby can prevent that the screen dish from too immersing in the cleaning fluid, and because the position of reticular lamina on cleaning fluid limited by stop block, thereby can prevent that cleaning fluid from sputtering on the screen dish.The 4th, because the thorough residue that promptly coats with lacquer of dissolved impurity of cleaning fluid, thereby can prevent that impurity is along the side following current of screen dish.The 5th, it also can prevent the gas leakage because of sealing-in place of the awl of the screen due to the bad cleaning, the i.e. decline of vacuum degree.

More than, the embodiment shown in has described screen dish cleaning device of the present invention with reference to the accompanying drawings.But the present invention is not limited to above embodiment, should be understood that those skilled in the art can carry out various changes, can not break away from the scope of the invention and essence.

Claims

The screen dish cleaning device of 1 one kinds of cathode ray tubes comprises:

Transmit the hanger of screen dish;

Be contained under the screen dish that transmits by described hanger, hold described screen dish shirt rim and include the groove of the cleaning fluid that cleans described screen dish shirt rim;

Be contained in the reticular lamina in the described groove;

Be contained between described bottom land surface and the reticular lamina, upwards the elastomeric element of elasticity mobile network shape plate;

Described groove is promoted to the device of described screen dish.
2 cathode-ray tube blanking disk cleaning devices as claimed in claim 1 is characterized in that described cleaning fluid is an acetone.
3 cathode-ray tube blanking disk cleaning devices as claimed in claim 1 is characterized in that, the stop block of the described reticular lamina height of restriction is housed in described groove, so that described reticular lamina remains on described in the described groove on the cleaning fluid surface.
4 cathode-ray tube blanking disk cleaning devices as claimed in claim 1 is characterized in that described groove comprises the inwall that is lower than described groove outer wall, constitute groove at described groove middle part.
5 cathode-ray tube blanking disk cleaning devices as claimed in claim 1 is characterized in that described screen dish cleaning device also comprises the funnel of reception by the cleaning fluid that overflows of described groove leakage.
6 cathode-ray tube blanking disk cleaning devices as claimed in claim 1 is characterized in that described lifting device comprises:

The support that links to each other with described trench bottom;

The guide rod that one end links to each other with described support;

The cylinder that has the bar that links to each other with the described guide rod other end.
7 cathode-ray tube blanking disk cleaning devices as claimed in claim 1 is characterized in that also comprising:

The cleaning fluid supply pipe that links to each other with described groove side;

Be installed on the described supply pipe, the valve of the cleaning fluid of described groove is supplied with in control.